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Direction: In the following questions, a statement of assertion (A) is followed by a statement of reason (R). Mark the correct choice as:
Assertion : Mitochondria and chloroplasts are semiautonomous organelles.
Reason : They are formed by division of pre-existing organelles and contain DNA but lack protein synthesizing machinery.
- a)Both assertion (A) and reason (R) are true and reason (R) is the correct explanation of assertion (A).
- b)Both assertion (A) and reason (R) are true but reason (R) is not the correct explanation of assertion (A).
- c)Assertion (A) is true but reason (R) is false.
- d)Assertion (A) is false but reason (R) is true.
Correct answer is option 'C'. Can you explain this answer?
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Direction: In the following questions, a statement of assertion (A) i...
Both mitochondria and chloroplasts are double membrane bound, semi-autonomous cell organelles. Their structure and functions are partially controlled by nucleus of the cell and partially by themselves. Both possess their own DNA and arise from the
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pre-existing cells. 70S type of ribosome is present in both organelles which can help to translate the coded information contained in mRNA and protein synthesis.
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Direction: In the following questions, a statement of assertion (A) i...
Assertion: Mitochondria and chloroplasts are semiautonomous organelles.
Reason: They are formed by division of pre-existing organelles and contain DNA but lack protein synthesizing machinery.
The correct answer is option 'C', Assertion (A) is true but reason (R) is false.
Explanation:
- Mitochondria and chloroplasts are semiautonomous organelles, which means they have their own DNA and can reproduce independently within the cell. They are believed to have originated from free-living bacteria that were engulfed by ancestral eukaryotic cells through endosymbiosis.
- These organelles contain their own DNA, which is separate from the nuclear DNA of the cell. This DNA encodes for some proteins and RNA molecules necessary for their functioning.
- However, the reason provided in the statement is incorrect. Mitochondria and chloroplasts do contain protein synthesizing machinery. They have their own ribosomes, which are responsible for synthesizing proteins using the genetic information encoded in their DNA. These ribosomes are similar to bacterial ribosomes in structure and function.
- The proteins synthesized within mitochondria and chloroplasts are essential for their own functioning and maintenance. However, most of the proteins required by these organelles are encoded by nuclear DNA and synthesized in the cytoplasm. They are then imported into the organelles with the help of specific targeting sequences.
- The presence of their own DNA, ability to reproduce independently, and possession of protein synthesizing machinery (ribosomes) are some of the characteristics that make mitochondria and chloroplasts semiautonomous organelles.
In conclusion, the assertion that mitochondria and chloroplasts are semiautonomous organelles is true. However, the reason provided in the statement is false as these organelles do contain protein synthesizing machinery.
Reason: They are formed by division of pre-existing organelles and contain DNA but lack protein synthesizing machinery.
The correct answer is option 'C', Assertion (A) is true but reason (R) is false.
Explanation:
- Mitochondria and chloroplasts are semiautonomous organelles, which means they have their own DNA and can reproduce independently within the cell. They are believed to have originated from free-living bacteria that were engulfed by ancestral eukaryotic cells through endosymbiosis.
- These organelles contain their own DNA, which is separate from the nuclear DNA of the cell. This DNA encodes for some proteins and RNA molecules necessary for their functioning.
- However, the reason provided in the statement is incorrect. Mitochondria and chloroplasts do contain protein synthesizing machinery. They have their own ribosomes, which are responsible for synthesizing proteins using the genetic information encoded in their DNA. These ribosomes are similar to bacterial ribosomes in structure and function.
- The proteins synthesized within mitochondria and chloroplasts are essential for their own functioning and maintenance. However, most of the proteins required by these organelles are encoded by nuclear DNA and synthesized in the cytoplasm. They are then imported into the organelles with the help of specific targeting sequences.
- The presence of their own DNA, ability to reproduce independently, and possession of protein synthesizing machinery (ribosomes) are some of the characteristics that make mitochondria and chloroplasts semiautonomous organelles.
In conclusion, the assertion that mitochondria and chloroplasts are semiautonomous organelles is true. However, the reason provided in the statement is false as these organelles do contain protein synthesizing machinery.
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Direction: In the following questions, a statement of assertion (A) is followed by a statement of reason (R). Mark the correct choice as:Assertion : Mitochondria and chloroplasts are semiautonomous organelles.Reason : They are formed by division of pre-existing organelles and contain DNA but lack protein synthesizing machinery.a)Both assertion (A) and reason (R) are true and reason (R) is the correct explanation of assertion (A).b)Both assertion (A) and reason (R) are true but reason (R) is not the correct explanation of assertion (A).c)Assertion (A) is true but reason (R) is false.d)Assertion (A) is false but reason (R) is true.Correct answer is option 'C'. Can you explain this answer?
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Direction: In the following questions, a statement of assertion (A) is followed by a statement of reason (R). Mark the correct choice as:Assertion : Mitochondria and chloroplasts are semiautonomous organelles.Reason : They are formed by division of pre-existing organelles and contain DNA but lack protein synthesizing machinery.a)Both assertion (A) and reason (R) are true and reason (R) is the correct explanation of assertion (A).b)Both assertion (A) and reason (R) are true but reason (R) is not the correct explanation of assertion (A).c)Assertion (A) is true but reason (R) is false.d)Assertion (A) is false but reason (R) is true.Correct answer is option 'C'. Can you explain this answer? for Class 9 2024 is part of Class 9 preparation. The Question and answers have been prepared according to the Class 9 exam syllabus. Information about Direction: In the following questions, a statement of assertion (A) is followed by a statement of reason (R). Mark the correct choice as:Assertion : Mitochondria and chloroplasts are semiautonomous organelles.Reason : They are formed by division of pre-existing organelles and contain DNA but lack protein synthesizing machinery.a)Both assertion (A) and reason (R) are true and reason (R) is the correct explanation of assertion (A).b)Both assertion (A) and reason (R) are true but reason (R) is not the correct explanation of assertion (A).c)Assertion (A) is true but reason (R) is false.d)Assertion (A) is false but reason (R) is true.Correct answer is option 'C'. Can you explain this answer? covers all topics & solutions for Class 9 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for Direction: In the following questions, a statement of assertion (A) is followed by a statement of reason (R). Mark the correct choice as:Assertion : Mitochondria and chloroplasts are semiautonomous organelles.Reason : They are formed by division of pre-existing organelles and contain DNA but lack protein synthesizing machinery.a)Both assertion (A) and reason (R) are true and reason (R) is the correct explanation of assertion (A).b)Both assertion (A) and reason (R) are true but reason (R) is not the correct explanation of assertion (A).c)Assertion (A) is true but reason (R) is false.d)Assertion (A) is false but reason (R) is true.Correct answer is option 'C'. Can you explain this answer?.
Direction: In the following questions, a statement of assertion (A) is followed by a statement of reason (R). Mark the correct choice as:Assertion : Mitochondria and chloroplasts are semiautonomous organelles.Reason : They are formed by division of pre-existing organelles and contain DNA but lack protein synthesizing machinery.a)Both assertion (A) and reason (R) are true and reason (R) is the correct explanation of assertion (A).b)Both assertion (A) and reason (R) are true but reason (R) is not the correct explanation of assertion (A).c)Assertion (A) is true but reason (R) is false.d)Assertion (A) is false but reason (R) is true.Correct answer is option 'C'. Can you explain this answer? for Class 9 2024 is part of Class 9 preparation. The Question and answers have been prepared according to the Class 9 exam syllabus. Information about Direction: In the following questions, a statement of assertion (A) is followed by a statement of reason (R). Mark the correct choice as:Assertion : Mitochondria and chloroplasts are semiautonomous organelles.Reason : They are formed by division of pre-existing organelles and contain DNA but lack protein synthesizing machinery.a)Both assertion (A) and reason (R) are true and reason (R) is the correct explanation of assertion (A).b)Both assertion (A) and reason (R) are true but reason (R) is not the correct explanation of assertion (A).c)Assertion (A) is true but reason (R) is false.d)Assertion (A) is false but reason (R) is true.Correct answer is option 'C'. Can you explain this answer? covers all topics & solutions for Class 9 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for Direction: In the following questions, a statement of assertion (A) is followed by a statement of reason (R). Mark the correct choice as:Assertion : Mitochondria and chloroplasts are semiautonomous organelles.Reason : They are formed by division of pre-existing organelles and contain DNA but lack protein synthesizing machinery.a)Both assertion (A) and reason (R) are true and reason (R) is the correct explanation of assertion (A).b)Both assertion (A) and reason (R) are true but reason (R) is not the correct explanation of assertion (A).c)Assertion (A) is true but reason (R) is false.d)Assertion (A) is false but reason (R) is true.Correct answer is option 'C'. Can you explain this answer?.
Solutions for Direction: In the following questions, a statement of assertion (A) is followed by a statement of reason (R). Mark the correct choice as:Assertion : Mitochondria and chloroplasts are semiautonomous organelles.Reason : They are formed by division of pre-existing organelles and contain DNA but lack protein synthesizing machinery.a)Both assertion (A) and reason (R) are true and reason (R) is the correct explanation of assertion (A).b)Both assertion (A) and reason (R) are true but reason (R) is not the correct explanation of assertion (A).c)Assertion (A) is true but reason (R) is false.d)Assertion (A) is false but reason (R) is true.Correct answer is option 'C'. Can you explain this answer? in English & in Hindi are available as part of our courses for Class 9.
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Here you can find the meaning of Direction: In the following questions, a statement of assertion (A) is followed by a statement of reason (R). Mark the correct choice as:Assertion : Mitochondria and chloroplasts are semiautonomous organelles.Reason : They are formed by division of pre-existing organelles and contain DNA but lack protein synthesizing machinery.a)Both assertion (A) and reason (R) are true and reason (R) is the correct explanation of assertion (A).b)Both assertion (A) and reason (R) are true but reason (R) is not the correct explanation of assertion (A).c)Assertion (A) is true but reason (R) is false.d)Assertion (A) is false but reason (R) is true.Correct answer is option 'C'. Can you explain this answer? defined & explained in the simplest way possible. Besides giving the explanation of
Direction: In the following questions, a statement of assertion (A) is followed by a statement of reason (R). Mark the correct choice as:Assertion : Mitochondria and chloroplasts are semiautonomous organelles.Reason : They are formed by division of pre-existing organelles and contain DNA but lack protein synthesizing machinery.a)Both assertion (A) and reason (R) are true and reason (R) is the correct explanation of assertion (A).b)Both assertion (A) and reason (R) are true but reason (R) is not the correct explanation of assertion (A).c)Assertion (A) is true but reason (R) is false.d)Assertion (A) is false but reason (R) is true.Correct answer is option 'C'. Can you explain this answer?, a detailed solution for Direction: In the following questions, a statement of assertion (A) is followed by a statement of reason (R). Mark the correct choice as:Assertion : Mitochondria and chloroplasts are semiautonomous organelles.Reason : They are formed by division of pre-existing organelles and contain DNA but lack protein synthesizing machinery.a)Both assertion (A) and reason (R) are true and reason (R) is the correct explanation of assertion (A).b)Both assertion (A) and reason (R) are true but reason (R) is not the correct explanation of assertion (A).c)Assertion (A) is true but reason (R) is false.d)Assertion (A) is false but reason (R) is true.Correct answer is option 'C'. Can you explain this answer? has been provided alongside types of Direction: In the following questions, a statement of assertion (A) is followed by a statement of reason (R). Mark the correct choice as:Assertion : Mitochondria and chloroplasts are semiautonomous organelles.Reason : They are formed by division of pre-existing organelles and contain DNA but lack protein synthesizing machinery.a)Both assertion (A) and reason (R) are true and reason (R) is the correct explanation of assertion (A).b)Both assertion (A) and reason (R) are true but reason (R) is not the correct explanation of assertion (A).c)Assertion (A) is true but reason (R) is false.d)Assertion (A) is false but reason (R) is true.Correct answer is option 'C'. Can you explain this answer? theory, EduRev gives you an
ample number of questions to practice Direction: In the following questions, a statement of assertion (A) is followed by a statement of reason (R). Mark the correct choice as:Assertion : Mitochondria and chloroplasts are semiautonomous organelles.Reason : They are formed by division of pre-existing organelles and contain DNA but lack protein synthesizing machinery.a)Both assertion (A) and reason (R) are true and reason (R) is the correct explanation of assertion (A).b)Both assertion (A) and reason (R) are true but reason (R) is not the correct explanation of assertion (A).c)Assertion (A) is true but reason (R) is false.d)Assertion (A) is false but reason (R) is true.Correct answer is option 'C'. Can you explain this answer? tests, examples and also practice Class 9 tests.
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